Vermont Senator Bernie Sanders is comparing climate change skeptics to those who disregarded the Nazi threat to America in the 1930s, adding a strident rhetorical shot to the already volatile debate over climate change.

“It reminds me in some ways of the debate taking place in this country and around the world in the late 1930s,” said Sanders, perhaps the most liberal member of the Senate, during a Senate hearing Tuesday. “During that period of Nazism and fascism’s growth-a real danger to the United States and democratic countries around the world- there were people in this country and in the British parliament who said ‘don’t worry! Hitler’s not real! It’ll disappear!”

Sanders’ reference to the Nazi threat is sure to enrage Republicans who are already skeptical of the science behind climate change. But Sanders wasn’t the only one throwing bombs at a hearing that was ostensibly about the EPA’s fiscal 2011 budget. Sen. Jim Inhofe (R-Okla.), who has called global warming a “hoax,” is asking for an investigation into the science used in the latest Intergovernmental Panel on Climate Change (IPCC), the governing body on climate science.